A discontinuous Galerkin method to solve Liouville’s equation of geometrical optics Robert A.M. van Gestel, Martijn J.H. Anthonissen, Jan H.M. ten Thije Boonkkamp and Wilbert L. IJzerman EPJ Web Conf., 266 (2022) 02005 Published online: 13 October 2022 DOI: 10.1051/epjconf/202226602005